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H. I. COE & J. J. MGBRIDE. DEVICE EOE OPERATING ELE VATOE EATGEWAY DOORS.

'Patent-.ed Jan. 14, 1890.

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H.1. 00B au J. J. MOBRIDB. DEVICE EOE OPERATING ELEVATOR HAITCEWAY DOORS.

No. 419,317. Patented Jan. 14,1890.

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i? 111 w11 W11; um 111| f M l 1 1| l `1|| L, 1 Il h l f A E (Mll-E E E E E- UNITED STATES PATENT OFFICE.

HENRY I. COE, NEW YORK, N. Y., AND JOHN J. MOBRIDE, OF RIDGEEIELD PARK, NEW JERSEY; SAID MCBRIDE ASSGNOR TO SAID COE.

DEVICE FOR OPERATING ELEVATOR-HATCHWAY DOORS.

SPECIFICATION forming part of Letters Patent No. 419,317, dated January 14, 1890.

Application filed March 28, 1889. Serial No. 305,097. (No model.)

To @ZZ whom it may concern,.-

Be it known that we, HENRY I. COE and JOHN J AMEs MCBRIDE, citizens of the United States, residing, respectively, at New York,

county and State of New York, and Ridgefield Park, Bergen county, State of New Jersey, have invented certain new and useful Improvements iu Safety-Doors for Dumb-Taiters, of which the following is a specification.

Although various devices have been heretofore employed for closing the hatchways of power and other elevators, it is believed that little or no attention has been paid to the almost equally important subject of closing the shafts of dumb-waiters, which expose buildings to the same danger of ydestruction by fire as do the hatchways of elevators. On this and other accounts it is desirable that some means for maintaining the shafts of dumbzo waiters closed between separate floors should be provided, and this is the object of our invention, the details of which are more fully described with reference to the accompanyin g drawings, reference being had. to the claim z 5 for the novel features.

lIn said drawings, Figure l is avperspective View of a portion of a dumb-waiter shaft containing our invention. Fig. 2 is av plan view of the same. Fig. 3 is aside elevation of the 3o doorguiding mechanism. Fig. 4 is a sectional plan of the same.

l represents a portion of the shaft or well of a dumb-Waiter car or platform 2, which has the usual guides 3. p

4 4 are half-doors, which have at each end guide-pins 5 5, preferably surrounded by anti-friction rollers 6. These pins retain and travel in the represented curved and upturned slotted guides 7, fixed to the sides of the shaft 4o 1. Each of these slotted guides slopes at first gently then abruptly upward toward the well- Wall.

The meeting edges of the doors 4 have at 8 holes for the dumb-waiter rope, and at 9 guides for the cams l0. At each end of the dumb-waiter and at bothtop and bottom 0f the same it will be seen that as the waiter either rises or falls in the shaft the cams 10 passing between the guides 9 will press the doors apart, and as the pins 5 travel in the 5o slotted guides 7 the doors vwill be pushed from their nearly-horizontal position to a p0- sition substantially parallel with the back and front of the shaft, so as to allow the dumbwaiter to pass freely. p

To enable the ready turning of the doors from horizontal to vertical position, the guidepins 5 are preferably placed, as shown, at some distance apart. When the doors are in their lower position, they are at a slight angle 6o to the horizontal, and will thus be kept by gravity pressing on one another, and to avoid a sudden turn in the slot its upper part is preferably at a slight angle to the vertical, as shown in Fig. 3.

The guides 9 on the meeting edges of the doors are preferably employed, as they insure the cams l0 entering the aperture between the two doors, but obviously they are not essential.

In order that there may be little or no passage for'air around,the doors, ledges 1l may be arranged in they shaft immediately under the outer edges of the doors when in their lower or closed'position, as shown at 12, 75 so as to fit around the guides 3.

Having thus described our invention, the following is what we claim as new therein and desire to secure by Letters Patent:

The combination, with the four slotted 8o guides 7, fixed to the well or shaft wall, each guide sloped gently and then steeply upward toward the said wall, of the two inflexible v half-doors 4, of which doors each has at its opposite ends two distant guide-pins 5, adapted to travel in said slotted guides, in the manner explained.

HENRY I. COE. JOHN J. MCBRIDE. Witnesses:

HARRY E. KNIGHT,

MAZIE V. BIDGooD. 

